Add missing XML Schema reference
diff --git a/src/assembly/bin.xml b/src/assembly/bin.xml
index cf3f008..e8dcfad 100644
--- a/src/assembly/bin.xml
+++ b/src/assembly/bin.xml
@@ -14,7 +14,9 @@
See the License for the specific language governing permissions and
limitations under the License.
-->
-<assembly>
+<assembly xmlns="http://maven.apache.org/ASSEMBLY/2.2.0"
+ xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+ xsi:schemaLocation="http://maven.apache.org/ASSEMBLY/2.2.0 http://maven.apache.org/xsd/assembly-2.2.0.xsd">
<id>bin</id>
<formats>
<format>tar.gz</format>
diff --git a/src/assembly/src.xml b/src/assembly/src.xml
index f5373b0..891f8e2 100644
--- a/src/assembly/src.xml
+++ b/src/assembly/src.xml
@@ -14,7 +14,9 @@
See the License for the specific language governing permissions and
limitations under the License.
-->
-<assembly>
+<assembly xmlns="http://maven.apache.org/ASSEMBLY/2.2.0"
+ xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+ xsi:schemaLocation="http://maven.apache.org/ASSEMBLY/2.2.0 http://maven.apache.org/xsd/assembly-2.2.0.xsd">
<id>src</id>
<formats>
<format>tar.gz</format>